Aerosol-generating article system with olfactory malodor inhibition

ABSTRACT

An aerosol-generating article is provided, including: an aerosol-forming substrate; an odor inhibition substrate including at least 10 different odor components; and a wrapper circumscribing at least a portion of the aerosol-forming substrate, the odor inhibition substrate being provided on the wrapper. An aerosol-generating system including an aerosol-generating device including a heater, and the aerosol-generating article, is also provided.

The present disclosure relates to an aerosol generating article for use with an aerosol generating device. In particular, the present invention relates to an aerosol generating article for use with an aerosol generating device, the aerosol generating article comprises an odour inhibition substrate.

Aerosol generating articles in which an aerosol-forming substrate, such as a tobacco containing substrate, is heated rather than combusted are known in the art. Typically, in such aerosol generating articles an aerosol is generated by the transfer of heat from a heat source to a physically separate aerosol-forming substrate or material, which may be located in contact with, within, around, or downstream of the heat source. During use of the aerosol generating article, volatile compounds are released from the aerosol-forming substrate by heat transfer from the heat source and are entrained in air drawn through the aerosol generating article. As the released compounds cool, they condense or nucleate to form an aerosol.

Some aerosol generating articles of the prior art comprise a combustible heat source upstream of an aerosol-forming substrate. The aerosol-forming substrate may comprise tobacco. In use, heat from the combustible heat source heats the aerosol-forming substrate to volatilise compounds which cool and condense or nucleate to form an aerosol.

The aerosol-forming substrate may be heated by a separate aerosol generating device. A number of prior art documents disclose aerosol-generating devices for use with aerosol generating articles. Such devices include, for example, electrically heated aerosol generating devices in which an aerosol is generated by the transfer of heat from one or more electrical heater elements of the aerosol-generating device to the aerosol-forming substrate of a heated aerosol generating article.

However, it has been found that the process of heating the aerosol-forming substrate may also lead to the generation of unpleasant odours which is undesirable. This problem may be particularly pronounced when the aerosol-forming substrate comprises tobacco. In some instances, it has been observed that the aerosol generated by the aerosol generating device remains in the air and the surrounding environment after the user has finished using the aerosol generating device. This is known as “off-odour”. In other instances, it has been observed that improper use or maintenance of the aerosol generating device can lead to a distinct unpleasant odour. This may occur when, for example, an electric heater element of an aerosol generating device is not properly cleaned. This is known as “malodour”. Both off-odour and malodour may be experienced by both the user of the aerosol generating article and by others in close proximity to the aerosol generating article.

Accordingly, it would be desirable to provide an aerosol generating article in which the unpleasant odours, such as off-odour and malodour, caused by the heating of the aerosol-forming substrate are reduced or prevented.

It may be desirable to provide an aerosol generating article which reduces or prevents unpleasant odours without the use of overpowering fragrances or pleasant odours.

It may be desirable to provide an aerosol generating article which reduces or prevents unpleasant odours without affecting the flavour of the mainstream aerosol.

The present disclosure relates to an aerosol generating article. The aerosol generating article comprises an aerosol-forming substrate. The aerosol generating article may comprise an odour inhibition substrate.

The odour inhibition substrate may release at least one odour inhibition molecule to reduce or prevent unpleasant odours generated by the aerosol-forming substrate. The odour inhibition substrate may release an odour inhibition molecule which comprises an odour masking molecule such as a fragrance. The odour inhibition substrate may release an odour inhibition molecule, or specific combination of odour inhibition molecules, which is configured to produce an olfactory white. The odour inhibition substrate may release a combination of odour masking molecules and molecules configured to produce an olfactory white.

The provision of an odour inhibition substrate may advantageously reduce or prevent the perception of unpleasant odours, such as off-odour and malodour, caused by the heating of the aerosol-forming substrate in the aerosol generating article.

The odour inhibition substrate may comprise more than one different odour component. For example the odour inhibition substrate may comprise at least 2, at least 3, at least 5, or at least 8 different odour components. The odour inhibition substrate may comprise at least 10 different odour components.

As set out in more detail below, the provision of an odour inhibition substrate comprising at least 10 different odour components may advantageously improve the effectiveness of odour inhibition substrate to produce an olfactory white.

According to the present invention there is provided an aerosol generating article comprising an aerosol-forming substrate, and an odour inhibition substrate. The odour inhibition substrate comprises at least 10 different odour components.

It is known to cover or mask unpleasant odours using fragrances or pleasant odours. However, the inventors have identified that the provision of a large number of different odour components, for example 10 different odour components, reduces the ability of a subject to identify any of the individual odour components. In this way, the combination of 10 different odour components may generate an “olfactory white”. Without wishing to be bound by theory, it is thought that this effect may be analogous with the effect in vision where a mixture of different wavelengths or colours may be perceived as “white”, or in audition where a mixture of different sound frequencies may be perceived as a common perceptual hum termed “white noise”.

The concept of an “olfactory white” has been demonstrated. It has been found that the more odour components two mixtures have, the more similar the two mixtures smell even when they have no individual components in common. Moreover, odorant mixtures with about 10 or more components begin to reliably smell alike, regardless of which individual odour components are included. The effect becomes more pronounced where a greater number of odour components are included, for example 20, 30, or 40 odour components. As discussed in more detail below, the effect can also become more pronounced when the odour components span an olfactory stimulus space.

In use, the at least 10 different odour components of the odour inhibition substrate combine with the unpleasant odours, such as off-odour and malodour, caused by the heating of the aerosol-forming substrate, to form an olfactory white. The formation of the olfactory white means a user, and others in close proximity to the aerosol generating article, are unable to identify any of the specific odour components of the odour inhibition substrate. More importantly the user, and others in close proximity to the aerosol generating article, are unable to identify the off-odour and malodour caused by the heating of the aerosol-forming substrate. As a result, advantageously any unpleasant odours caused by the heating of the aerosol-forming substrate are not perceived.

As used herein with reference to the present invention, the term “aerosol generating article” is used herein to denote an article wherein an aerosol-forming substrate is heated to produce and deliver inhalable aerosol to a consumer. As used herein, the term “aerosol forming substrate” denotes a substrate capable of releasing volatile compounds upon heating to generate an aerosol.

As used herein with reference to the present invention, the term “odour components” refer to chemicals, substances which generate an odour. The odour component may comprise a single chemical element or compound. The odour component may generate an odour by releasing odour inhibition molecules.

The at least 10 different odour components may be any odour components. One or more of the at least 10 different odour components may be selected from a list consisting of: Abhexone, acetophenone, ortho-acetyl pyridine, strawberry aldehyde, gamma-nonalactone, isoamyl acetate, amyl butyrate, iso-pentyl phenyl acetate, pentyl valerate, anisole, benzaldehyde, iso-bornyl acetate, butanoic acid, butyl sulfide, caryophyllene, celeriax, chlorothymol, cinnamic aldehyde, coumarin, p-cresol, p-cresyl acetate, p-cresyl-iso-butyrate, 4-methyl anisole, cuminic aldehyde, cyclohexanol, 2,4-trans-trans-decadienal, dibutyl amine, diethyl sulfide, dimethyl benzyl carbinyl butyrate, muguet carbinol, 2,3-dimethyl pyrazine, 2,5-dimethyl pyrazine, dimethyl trisulfide, diphenyl oxide, ethyl butyrate, ethyl propionate, 2-ethyl pyrazine, Eucalyptol, Eugenol, furfuryl mercaptan, guaiacol, heptanal, 1-heptanol, Hexanal, hexanoic acid, 1-hexanol, 3-hexanol, trans-1-Hexanal, 2-phenyl propionaldehyde dimethyl acetal, hydroxy citronellal, Indole, Linalool, Melonal, I-menthol, 2-methoxy naphthalene, methyl anthranilate, methyl acetaldehyde dimethyl acetal, para-methyl quinoline, methyl salicylate, S-(methyl thio) butyrate, musk galaxolide, nonyl acetate, 1-octanol, 1-octen 3-ol, pentanoic acid, 4-pentenoic acid, phenyl acetic acid, phenyl acetylene, phenyl ethanol, iso-phorone, alpha-pinene, propyl butyrate, propyl sulfide, skatole, α-Terpineol, thioglycolic acid, thiophene, thymol, ortho-tolualdehyde, toluene, gamma-undecalactone, undecylenic acid, iso-valeraldehyde, iso-valeric acid, gamma-valerolactone, vanillin, acetic acid, acetaldehyde, acetoin, propan-2-one, butanal, octanal, 2-hydroxypropanoic acid, butane-2,3-dione, propan-1-ol, 2-oxopropanoic acid, Methylsulfanylmethane, decanoic acid, propan-2-ol, 2-methylpropanal, butan-2-one, methyl acetate, 2-methylpropanoic acid, methyl benzoate, ethyl benzoate, ethyl 2-hydroxypropanoate, 2-methyl-5-propan-2-ylcyclohexa-1,3-diene, 1-methyl-4-propan-2-ylbenzene, 2-phenylethyl acetate, (3S)-3,7-dimethyloct-6-en-1-ol, ethyl octanoate, propane-1-thiol, ethyl formate, ethyl decanoate, heptan-2-one, methyl octanoate, undecanal, ethyl acetate, 4-methylpent-3-en-2-one, butane-2-thiol, ethyl pentanoate, heptan-2-01, methyl propanoate, hexan-3-one, pent-1-en-3-ol, methyl butanoate, (methyldisulfanyl) methane, pentyl acetate, nonan-2-ol, decan-2-one, bis(methylsulfanyl)methane, pentan-2-ol, hexyl hexanoate, 4-methoxybenzaldehyde, diethyl butanedioate, ethyl hexanoate, butyl acetate, 4-ethyl guaiacol, (R)-(+)-beta-citronellol, Limonene, laevo-beta-pinene, geraniol, thiolane, trimethyl amine.

The at least 10 different odour components may be selected from this list. Each of the at least 10 different odour components may be selected from this list.

The provision of at least 10 different odour components selected from this list has been found to produce an effective olfactory white.

The at least 10 different odour components may span an olfactory stimulus space.

The provision of at least 10 different odour components span an olfactory stimulus space may produce a particularly effective olfactory white.

As used herein with reference to the present invention, the term “olfactory stimulus space” refers to a database which in which odour components are arranged based on a number of parameters of the odour component. The olfactory stimulus space may be an “odour perceptual space”. Where this is the case, odour components are assigned a plurality of perceptual descriptors which characterise the odour. An example of an appropriate “odour perceptual space” is the “Atlas of Odor Character Profiles” by Andrew Dravnieks which assigns a quantitative value to each of 146 perceptual descriptors for each of 114 odour components. The olfactory stimulus space may be an “odour physiochemical space”. Where this is the case, odour components are assigned physicochemical or molecular descriptors based on their chemical composition. The physicochemical or molecular descriptors may be assigned to the odour components using software. For example, the physicochemical or molecular descriptors may be assigned to the odour components using Dragon software from Talete S.r.l. In this way, a qualitative value is assigned to each of 1438 physicochemical properties for each of 1492 odour components.

By combining both the perceptual descriptors and the physicochemical properties, each odour component may be represented by a vector, the coordinates of which describe the 146 perceptual or 1438 physicochemical properties of any given odour component. By plotting a plurality of coordinates for different odour components, an “odour physiochemical space” may be constructed.

With this “odour physiochemical space”, the Euclidean distance between different odour components may be calculated. Moreover, in a mixture of a number of different odour components, it is also possible to calculate the minimum Euclidean distance between any given odour component and the closest other odour component in the mixture. For example, if the coordinates of the odour components in a mixture of a hypothetical odour physiochemical space were ([4,−6,8], [3,−3,10], [−4,0,3]), then the distance of an odorant x with coordinates [−2,1,1] to that mixture would be 3, because that is the distance to the closest point: [−4,0,3].

In this way, the average minimum Euclidean distance between any given odour component and the closest other odour component in the mixture of odour components, T(G), may be calculated. Using an iterative process, the average minimum Euclidean distance may be maximised.

Each of the at least 10 different odour components may be provided at a substantially equal perceived-intensity.

The provision of at least 10 different odour components provided at a substantially equal perceived-intensity has been found to produce a particularly effective olfactory white. This may be because no single odour component stands out from the mixture and so no single odour is identifiable.

To provide the odour components at a substantially equal perceived intensity, all the odour components to be used in a mixture are diluted in either mineral oil, 1,2-propanediol or deionized distilled water to a point of approximately equally perceived-intensity. At this point, the intensity of each diluted odour component is rated by a naïve subject group. Any odour component which are 2 or more or more standard deviations away from the mean intensity of the series are diluted further. This process is repeated until there are no outliers.

The odour inhibition substrate may comprise at least about 10 different odour components. For example, the odour inhibition substrate may comprise at least about 15 different odour components, at least about 20 different odour components, at least about 25 different odour components, or at least about 30 different odour components. The odour inhibition substrate may comprise at least 20, preferably at least 30 different odour components.

The odour inhibition substrate may comprise more than 30 different odour components. For example, the odour inhibition substrate may comprise at least about 35 different odour components, at least about 40 different odour components, at least about 45 different odour components, at least about 50 different odour components, at least about 55 different odour components, or at least about 60 different odour components.

It has been found that odour inhibition substrates containing a greater number of odour components may provide a more effective olfactory white.

The odour inhibition substrate may be a solid odour inhibition substrate. The odour inhibition substrate may be a liquid odour inhibition substrate.

The odour inhibition substrate may be applied to at least one other component of the aerosol generating article. The odour inhibition substrate may be applied to at least one other component of the aerosol generating article by any method. Where the odour inhibition substrate is a liquid, the odour inhibition substrate may be applied to at least one other component of the aerosol generating article by spraying as a solution, for example as an aqueous solution, as part of a glue or adhesive, or contained within at least one capsule or bead.

For example, the odour inhibition substrate may be encapsulated in a breakable capsule which is itself embedded in another component of the aerosol generating article. For example, the capsule may be embedded in a filter element or in a mouthpiece element. The capsule may be provided in a cavity in another component of the aerosol generating article. The breakable capsule may be configured to break or rupture during use of the aerosol generating article to release the liquid odour inhibition substrate. The breakable capsule may be configured to break or rupture in response to pressure from a user.

As set out in more detail below, the odour inhibition substrate may comprise a solid support material impregnated with odour components.

Where the odour inhibition substrate is a solid odour inhibition substrate, or is solid support material impregnated with odour components, the solid substrate or support material may be embedded in another component of the aerosol generating article. For example, the solid substrate or support material may be embedded in a filter element or in a mouthpiece element. The solid substrate or support material may be provided in a cavity in another component of the aerosol generating article.

The odour inhibition substrate may be provided anywhere in the aerosol generating article. For example, the odour inhibition substrate may be provided in one or more of a mouthpiece element, a filter element, or the aerosol-forming substrate.

The aerosol generating article may further comprise a wrapper. The wrapper may circumscribe at least a portion of the aerosol-forming substrate. The wrapper may be at least one of a wrapping paper, a tipping paper, or a plug wrap. The odour inhibition substrate may be provided on the wrapper.

The provision of the odour inhibition substrate on the wrapper may mean that the odour inhibition substrate is located close to the nose of a user when in use. This may advantageously maximise the effectiveness of the odour inhibition substrate to reduce or prevent the perception of unpleasant odours particularly by the user of the aerosol generating article. Additionally, the provision of the odour inhibition substrate on the wrapper, rather than for example, on a component embedded within the aerosol generating article, may keep the odour inhibition substrate separate from the mainstream aerosol generated by the aerosol-forming substrate. This may advantageously prevent the odour inhibition substrate interfering with the flavour of the aerosol generated by the aerosol-forming substrate.

The odour inhibition substrate may be provided on the inner surface of the wrapper. Preferably the odour inhibition substrate is provided on the outer surface of the wrapper.

The odour inhibition substrate may be provided at least about 8 millimetres, at least about 10 millimetres, or at least about 12 millimetres from the downstream end of the aerosol generating article. This may advantageously prevent the odour inhibition substrate being covered by a user's lips when is use.

The wrapper circumscribing at least a portion of the aerosol-forming substrate may be a paper wrapper or a non-paper wrapper. Suitable paper wrappers for use in specific embodiments of the invention are known in the art and include, but are not limited to: cigarette papers; and filter plug wraps. Suitable non-paper wrappers for use in specific embodiments of the invention are known in the art and include, but are not limited to sheets of homogenised tobacco materials. In certain preferred embodiments, the wrapper may be formed of a laminate material comprising a plurality of layers. Preferably, the wrapper is formed of an aluminium co-laminated sheet. The use of a co-laminated sheet comprising aluminium advantageously prevents combustion of the aerosol-forming substrate in the event that the aerosol-forming substrate should be ignited, rather than heated in the intended manner.

The wrapper may be a heat-conducting, non-combustible wrapper.

The provision of a heat-conducting, non-combustible wrapper may advantageously allow heat from the heater to be transferred by conduction to the aerosol-forming substrate. This may advantageously help to achieve sufficiently high conductive heat transfer from the heater to the aerosol-forming substrate to produce an acceptable aerosol.

Suitable heat-conducting, non-combustible wrappers include, but are not limited to: metal foil wrappers such as, for example, aluminium foil wrappers, steel foil wrappers, iron foil wrappers and copper foil wrappers; metal alloy foil wrappers; graphite foil wrappers; and certain ceramic fibre wrappers.

The wrapper may have any thickness. The wrapper may have a thickness of between about 30 micrometres and about 200 micrometres. The wrapper may have a thickness of at least about 30 micrometres, at least about 50 micrometres, or at least about 75 micrometres.

The wrapper may have a thickness of no more than about 250 micrometres, no more than about 200 micrometres, or no more than bout 150 micrometres.

For example, the wrapper may have a thickness of between about 50 micrometres and about 200 micrometres, or between about 75 micrometres and about 150 micrometres. The wrapper coating may have a thickness of about 150 micrometres.

As used herein with reference to the invention, the terms “upstream” and “front”, and “downstream” and “rear”, are used to describe the relative positions of components, or portions of components, of the aerosol generating article in relation to the direction in which airflows through the aerosol generating article during use thereof. Aerosol generating articles according to the invention comprise a proximal end through which, in use, an aerosol exits the article. The proximal end of the aerosol generating article may also be referred to as the mouth end or the downstream end. The mouth end is downstream of the distal end. The distal end of the aerosol generating article may also be referred to as the upstream end. Components, or portions of components, of the aerosol generating article may be described as being upstream or downstream of one another based on their relative positions between the proximal end of the aerosol generating article and the distal end of the aerosol generating article. The front of a component, or portion of a component, of the aerosol generating article is the portion at the end closest to the upstream end of the aerosol generating article. The rear of a component, or portion of a component, of the aerosol generating article is the portion at the end closest to the downstream end of the aerosol generating article.

The odour inhibition substrate may be provided as a band which circumscribes a portion of the wrapper.

The provision of a band which circumscribes the wrapper may advantageously simplify manufacture of the aerosol generating article.

The odour inhibition substrate may comprise a solid support material impregnated with odour components.

The provision of an odour inhibition substrate comprising a solid support material may advantageously provide a straightforward way for the odour components to be added to the aerosol generating article.

The odour components may be adsorbed or absorbed onto the solid support material.

The solid support material may comprise a porous solid support material. This may advantageously allow a greater amount of odour component to be absorbed into the solid support material.

The solid support material may comprise a strip of paper.

The strip of paper may circumscribe a portion of the wrapper. The strip of paper may be attached to the wrapper by an adhesive.

The strip of paper may have a basis weight of between about 20 gsm and about 120 gsm. For example, the strip of paper may have a basis weight of between about 40 gsm and about 100 gsm, or between about 60 gsm and about 90 gsm.

The upstream end of the strip of paper may be least 10 millimetres from the upstream end of the aerosol generating article.

Ensuring that the strip of paper is at least 10 millimetres from the upstream end of the aerosol generating article may advantageously ensure that the strip of paper is disposed outside of an aerosol generating device when an article is inserted into the device. If the strip of paper was disposed inside the aerosol generating device in use, the odour components would be unable to effectively diffuse to the nose of a user.

Ensuring that the strip of paper is at least 10 millimetres from the upstream end of the aerosol generating article may advantageously ensure that the odour inhibition substrate is disposed near the nose of a user which may help the odour inhibition substrate to reduce or prevent the unpleasant odours.

In embodiments where the odour inhibition substrate comprises a band but not a strip of paper, the upstream end of the band may be at least 10 millimetres from the upstream end of the aerosol generating article.

The upstream end of the strip of paper may be least 15 millimetres, or at least 17 millimetres from the upstream end of the aerosol generating article.

The downstream end of the strip of paper may be at least 8 millimetres from the downstream end of the aerosol generating article.

Ensuring that the strip of paper is at least 8 millimetres from the downstream end of the aerosol generating article may ensure that the strip of paper is not covered by the lips of a user when the aerosol generating article is in use. This may be advantageous since the odour inhibition substrate may not be intended to be orally consumed and covering the strip of paper with the lips of a user may prevent the odour components from reaching the nose of a user.

In embodiments where the odour inhibition substrate comprises a band but not a strip of paper, the downstream end of the band may be at least 8 millimetres from the downstream end of the aerosol generating article.

The downstream end of the strip of paper may be at least 10 millimetres, or at least 12 millimetres from the downstream end of the aerosol generating article.

The strip of paper may have a width of between about 1 millimetre and about 10 millimetres.

For example, the strip of paper may have a width of between about 1 millimetres and about 5 millimetres.

The odour inhibition substrate comprises a portion of the wrapper with odour components adsorbed or absorbed thereon.

Where the odour inhibition substrate comprises a portion of the wrapper with the odour components adsorbed or adsorbed thereon, there may be no need for a separate strip of paper. This may advantageously simplify manufacture and may also allow the article to maintain a constant diameter along its length.

The portion of the wrapper with odour components adsorbed or absorbed thereon may be indicated by an indicia. This may help to prevent a user from covering the odour inhibition substrate in use.

The odour inhibition substrate may comprise at least 0.01 grams of odour component.

In other words, the total mass of the at least 10 different odour components may be at least 0.01 grams.

The provision of at least 0.01 grams of odour component may advantageously reduce or prevent unpleasant odours generated by the aerosol-forming substrate.

For example, the odour inhibition substrate may comprise at least 0.05 grams, at least grams, at least 0.15 grams, at least 0.25 grams, at least 0.5 grams, or at least 1.0 grams of odour inhibition substrate.

The aerosol generating article may further comprise a downstream segment, located downstream of the aerosol-forming substrate, wherein the odour inhibition substrate overlies the downstream segment.

Providing the odour inhibition substrate about a downstream element rather than about the aerosol-forming substrate may keep the odour inhibition substrate separated from the aerosol-forming substrate. This may advantageously help prevent the odour components mixing with the mainstream aerosol. Providing the odour inhibition substrate about a downstream segment may also prevent the odour inhibition substrate from being heated during use of the aerosol generating article.

The downstream segment may be any downstream segment. For example, the downstream segment may comprise a single component. The downstream segment may comprise a plurality of components. The downstream segment may include one or more of a cooling element, a filter element, or a spacer element.

The downstream segment may comprise a mouthpiece element. The mouthpiece element may be located at the downstream end or mouth end of the aerosol generating article.

The downstream segment may comprise a segment of filtration material. For example, the mouthpiece element may comprise one or more segments of filtration material.

For example, the mouthpiece element may comprise one or more segments of a filtration material. The filtration material may comprise fibrous filtration material. Suitable fibrous filtration materials would be known to the skilled person. Particularly preferably, the at least one mouthpiece filter segment comprises a cellulose acetate filter segment formed of cellulose acetate tow.

The mouthpiece element may comprise of a single mouthpiece filter segment. The mouthpiece element may include two or more mouthpiece filter segments axially aligned in an abutting end to end relationship with each other.

The downstream segment may comprise a mouth end cavity at the downstream end, downstream of the mouthpiece element as described above. The mouth end cavity may be defined by a hollow tubular element provided at the downstream end of the mouthpiece. The mouth end cavity may be defined by the outer wrapper of the mouthpiece element, wherein the outer wrapper extends in a downstream direction from the mouthpiece element.

The mouthpiece element may optionally comprise a flavourant, which may be provided in any suitable form. For example, the mouthpiece element may comprise one or more capsules, beads or granules of a flavourant, or one or more flavour loaded threads or filaments.

The downstream segment of the aerosol generating article may comprise a support element located immediately downstream of the aerosol-forming substrate. The mouthpiece segment may be located downstream of the support element. The downstream segment may comprise an aerosol-cooling element located immediately downstream of the support element. The mouthpiece element may be located downstream of both the support element and the aerosol-cooling element. The mouthpiece element may be located immediately downstream of the aerosol-cooling element. The mouthpiece element may abut the downstream end of the aerosol-cooling element.

The mouthpiece element may have a low particulate filtration efficiency.

The mouthpiece element may be circumscribed by a plug wrap. The mouthpiece element may be unventilated such that air does not enter the aerosol-generating article along the mouthpiece element.

The aerosol generating article according to the present invention comprises an aerosol-forming substrate. The aerosol-forming substrate may be a solid aerosol-forming substrate. The aerosol-forming substrate may be a liquid aerosol-forming substrate. The aerosol-forming substrate may comprise both solid and liquid components. The aerosol-forming substrate may comprise a tobacco-containing material containing volatile tobacco flavour compounds, which are released from the substrate upon heating. The aerosol-forming substrate may comprise a non-tobacco material. The aerosol-forming substrate may further comprise one or more aerosol formers.

Suitable aerosol formers are for example: polyhydric alcohols such as, for example, triethylene glycol, 1,3-butanediol, propylene glycol and glycerine; esters of polyhydric alcohols such as, for example, glycerol mono-, di- or triacetate; aliphatic esters of mono-, di- or polycarboxylic acids such as, for example, dimethyl dodecanedioate and dimethyl tetradecanedioate; and combinations thereof.

The aerosol former may comprise one or more of glycerine and propylene glycol. The aerosol former may consist of glycerine or propylene glycol or of a combination of glycerine and propylene glycol.

The aerosol-forming substrate may have an aerosol former content of between about 5 percent and about 30 percent by weight on a dry weight basis, such as between about 10 percent and about 25 percent by weight on a dry weight basis, or between about 15 percent and about 20 percent by weight on a dry weight basis.

For example, if the substrate is intended for use in an aerosol generating article for an electrically-operated aerosol generating system having a heating element, it may preferably include an aerosol former content of between about 5 percent to about 30 percent by weight on a dry weight basis. If the substrate is intended for use in an aerosol generating article for an electrically-operated aerosol generating system having a heating element, the aerosol former is preferably glycerol.

In other embodiments, the aerosol-forming substrate may have an aerosol former content of about 1 percent to about 5 percent by weight on a dry weight basis

In other embodiments, the aerosol-forming substrate may have an aerosol former content of about 30 percent by weight to about 45 percent by weight. This relatively high level of aerosol former is particularly suitable for aerosol-generating substrates that are intended to be heated at a temperature of less than 275 degrees Celsius. In such embodiments, the aerosol-generating substrate preferably further comprises between about 2 percent by weight and about 10 percent by weight of cellulose ether, on a dry weight basis and between about 5 percent by weight and about 50 percent by weight of additional cellulose, on a dry weight basis. The use of the combination of cellulose ether and additional cellulose has been found to provide a particularly effective delivery of aerosol when used in an aerosol-forming substrate having an aerosol former content of between 30 percent by weight and 45 percent by weight.

As set out above, it has been found that the process of heating, rather than combusting the aerosol-forming substrate may lead to the generation of unpleasant odours which is undesirable. Without wishing to be bound by theory, it is thought that the generation of unpleasant odours may be in part caused by the aerosol former which helps to generate the aerosol. The amount of aerosol former in an aerosol generating article in which an aerosol-forming substrate is heated rather than combusted is typically higher than in traditional cigarettes. As a result the provision of an odour inhibition substrate in aerosol generating articles comprising this amount of aerosol former may be particularly advantageous to reduce or prevent the perception of unpleasant odours.

The aerosol-forming substrate may be a rod comprising a tobacco-containing material.

If the aerosol-forming substrate is a solid aerosol-forming substrate, the solid aerosol-forming substrate may comprise, for example, one or more of: powder, granules, pellets, shreds, spaghetti strands, strips or sheets containing one or more of: herb leaf, tobacco leaf, fragments of tobacco ribs, reconstituted tobacco, homogenised tobacco, extruded tobacco and expanded tobacco. The solid aerosol-forming substrate may be in loose form, or may be provided in a suitable container or cartridge. For example, the aerosol-forming material of the solid aerosol-forming substrate may be contained within a paper or other wrapper and have the form of a plug. Where an aerosol-forming substrate is in the form of a plug, the entire plug including any wrapper is considered to be the aerosol-forming substrate.

The solid aerosol-forming substrate may contain additional tobacco or nontobacco volatile flavour compounds, to be released upon heating of the solid aerosol-forming substrate. The solid aerosol-forming substrate may also contain capsules that, for example, include the additional tobacco or non-tobacco volatile flavour compounds and such capsules may melt during heating of the solid aerosol-forming substrate.

The solid aerosol-forming substrate may be provided on or embedded in a thermally stable carrier. The carrier may take the form of powder, granules, pellets, shreds, spaghetti strands, strips or sheets. The solid aerosol-forming substrate may be deposited on the surface of the carrier in the form of, for example, a sheet, foam, gel or slurry. The solid aerosol-forming substrate may be deposited on the entire surface of the carrier. The solid aerosol-forming substrate may be deposited in a pattern in order to provide a non-uniform flavour delivery during use.

The aerosol-forming substrate may be in the form of a plug or segment comprising a material capable of emitting volatile compounds in response to heating circumscribed by a paper or other wrapper. Where an aerosol-forming substrate is in the form of such a plug or segment, the entire plug or segment including any wrapper is considered to be the aerosol-forming substrate.

The aerosol-forming substrate preferably has a length of between about 5 millimetres and about 20 millimetres. In certain embodiments, the aerosol-forming substrate may have a length of between about 6 millimetres and about 15 millimetres or a length of between about 7 millimetres and about 12 millimetres.

The aerosol-forming substrate may comprise a plug of tobacco-based material wrapped in a plug wrap. In preferred embodiments, the aerosol-forming substrate comprises a plug of homogenised tobacco-based material wrapped in a plug wrap.

The aerosol-generating article may further comprise a susceptor element within the aerosol-forming substrate. In some embodiments, the susceptor element may be an elongate susceptor element. In preferred embodiments, the susceptor element extend longitudinally within the aerosol-forming substrate.

Aerosol generating articles according to the invention may comprise a transfer element, or spacer element, downstream of the aerosol-forming substrate. Such an element may take the form of a hollow tube that is located downstream of an aerosol-forming substrate.

The hollow tube may extend from the downstream end of the aerosol-forming substrate to the downstream end of the aerosol generating article.

The transfer element may abut one or both of the aerosol-forming substrate and a mouthpiece. The transfer element may be spaced apart from one or both of the aerosol-forming substrate and the mouthpiece.

The inclusion of a transfer element advantageously allows cooling of the aerosol. The inclusion of a transfer element also advantageously allows the overall length of the aerosol generating article to be adjusted to a desired value, for example to a length similar to that of a conventional cigarette, through an appropriate choice of the length of the transfer element.

The transfer element may have a length of between about 7 millimetres and about 50 millimetres, for example a length of between about 10 millimetres and about 45 millimetres or of between about 15 millimetres and about 30 millimetres. The transfer element may have other lengths depending upon the desired overall length of the aerosol generating article, and the presence and length of other components within the aerosol generating article.

Preferably, the transfer element comprises at least one open-ended tubular hollow body. In such embodiments, in use, air drawn into the aerosol generating article passes through the at least one open-ended tubular hollow body as it passes downstream through the aerosol generating article from the aerosol-forming substrate to the distal end of the aerosol generating article.

Aerosol generating articles according to the invention may comprise an aerosol-cooling element or heat exchanger downstream of the aerosol-forming substrate. The aerosol-cooling element may comprise a plurality of longitudinally extending channels. Where the aerosol generating article comprises a transfer element downstream of the aerosol-forming substrate, the aerosol-cooling element is preferably downstream of the transfer element.

The aerosol-cooling element may comprise a gathered sheet of material selected from the group consisting of metallic foil, polymeric material, and substantially non-porous paper or cardboard. In certain embodiments, the aerosol-cooling element may comprise a gathered sheet of material selected from the group consisting of polyethylene (PE), polypropylene (PP), polyvinylchloride (PVC), polyethylene terephthalate (PET), polylactic acid (PLA), cellulose acetate (CA), and aluminium foil.

In certain preferred embodiments, the aerosol-cooling element may comprise a gathered sheet of biodegradable polymeric material, such as polylactic acid (PLA) or a grade of Mater-Bi® (a commercially available family of starch based copolyesters).

Aerosol generating articles according to the present invention may comprise a plurality of elements assembled in the form of a rod.

The aerosol generating article may comprise an upstream element upstream of the aerosol-forming substrate. The provision of an upstream element may advantageously protect the aerosol-forming substrate and prevent a user coming into direct contact with the aerosol-forming substrate. The upstream element may comprise an annular plug comprising fibrous filtration material.

The aerosol generating article may be substantially cylindrical in shape. The aerosol generating article may be substantially elongate. The aerosol-forming substrate may be substantially cylindrical in shape. The aerosol-forming substrate may be substantially elongate. The aerosol-forming substrate may be located in the aerosol generating article such that the length of the aerosol-forming substrate is substantially parallel to the airflow direction in the aerosol generating article.

The transfer section or element may be substantially elongate.

The aerosol generating article may have any desired length. For example, the aerosol generating article may have a total length of between about 25 millimetres and about 50 millimetres, or between about 30 millimetres and about 35 millimetres. The aerosol generating article may have any desired external diameter. For example, the aerosol generating article may have an external diameter of between about 4 millimetres and about 15 millimetres, or between about 4.2 millimetres and about 8 millimetres.

According to the present invention, there is provided an aerosol generating system comprising, an aerosol generating device comprising a heater, and an aerosol generating article according to the present invention.

The aerosol generating system may be configured to heat the aerosol-forming substrate to a temperature of between about 100 degrees Celsius and about 500 degrees Celsius. For example, the aerosol generating system may be configured to heat the aerosol-forming substrate to a temperature of between about 150 degrees Celsius and about 450 degrees Celsius, or between about 200 degrees Celsius and about 400 degrees Celsius.

As set out above, it has been found that the process of heating, rather than combusting the aerosol-forming substrate may lead to the generation of unpleasant odours which is undesirable. In aerosol generating articles in which an aerosol-forming substrate is heated rather than combusted to generate an aerosol, the aerosol-forming substrate is typically heated to a temperature considerably lower than the combustion temperature for the aerosol-forming substrate. As a result the provision of an odour inhibition substrate in aerosol generating articles for use in systems configures to heat them to temperatures between about 100 degrees Celsius and about 500 degrees Celsius may be particularly advantageous to reduce or prevent the perception of unpleasant odours.

The aerosol generating device may be an electrically heated aerosol generating device. Where this is the case, the aerosol generating device may comprise an electrical power source, such as a battery, control electronics, and an electrical heater. The electrical heater may be a resistance heater and may take the form of a blade or a pin. The electrical heater may be an induction heater comprising an elongate susceptor configured to be received by the recess of the aerosol generating article of the present invention, and at least one induction coil configured to inductively heat the susceptor. A user may use the aerosol generating device in cooperation with an aerosol generating article comprising an aerosol-forming substrate. The heater of the aerosol generating device heats the aerosol-forming substrate of the aerosol generating article to generate an aerosol which may be inhaled by a user.

The aerosol generating device may be configured to heat the aerosol-forming substrate to a temperature of between about 100 degrees Celsius and about 500 degrees Celsius. For example, the aerosol generating device may be configured to heat the aerosol-forming substrate to a temperature of between about 150 degrees Celsius and about 450 degrees Celsius, or between about 200 degrees Celsius and about 400 degrees Celsius.

The aerosol generating device may be configured to produce an aerosol from a liquid aerosol-forming substrate. Where this is the case, the heater may comprise a coil-and-wick arrangement.

The aerosol generating device may further comprise an odour inhibition assembly. The odour inhibition assembly may comprises at least one chamber for receiving at least one odour inhibition substrate. The odour inhibition substrate may be substantially the same as the odour inhibition substrate on the aerosol generating article. The provision of a reduce or prevent unpleasant odours generated by the aerosol-forming substrate.

The invention is defined in the claims. However, below there is provided a non-exhaustive list of non-limiting examples. Any one or more of the features of these examples may be combined with any one or more features of another example, embodiment, or aspect described herein.

Example 1: An aerosol generating article comprising: an aerosol-forming substrate, and an odour inhibition substrate, wherein the odour inhibition substrate comprising at least 10 different odour components.

Example 2: An aerosol generating article according to Example 1, wherein one or more of the at least 10 different odour components are selected from a list consisting of: Abhexone, acetophenone, ortho-acetyl pyridine, strawberry aldehyde, gamma-nonalactone, isoamyl acetate, amyl butyrate, iso-pentyl phenyl acetate, pentyl valerate, anisole, benzaldehyde, iso-bornyl acetate, butanoic acid, butyl sulfide, caryophyllene, celeriax, chlorothymol, cinnamic aldehyde, coumarin, p-cresol, p-cresyl acetate, p-cresyl-iso-butyrate, 4-methyl anisole, cuminic aldehyde, cyclohexanol, 2,4-trans-trans-decadienal, dibutyl amine, diethyl sulfide, dimethyl benzyl carbinyl butyrate, muguet carbinol, 2,3-dimethyl pyrazine, 2,5-dimethyl pyrazine, dimethyl trisulfide, diphenyl oxide, ethyl butyrate, ethyl propionate, 2-ethyl pyrazine, Eucalyptol, Eugenol, furfuryl mercaptan, guaiacol, heptanal, 1-heptanol, Hexanal, hexanoic acid, 1-hexanol, 3-hexanol, trans-1-Hexanal, 2-phenyl propionaldehyde dimethyl acetal, hydroxy citronellal, Indole, Linalool, Melonal, I-menthol, 2-methoxy naphthalene, methyl anthranilate, methyl acetaldehyde dimethyl acetal, para-methyl quinoline, methyl salicylate, S-(methyl thio) butyrate, musk galaxolide, nonyl acetate, 1-octanol, 1-octen 3-ol, pentanoic acid, 4-pentenoic acid, phenyl acetic acid, phenyl acetylene, phenyl ethanol, iso-phorone, alpha-pinene, propyl butyrate, propyl sulfide, skatole, α-Terpineol, thioglycolic acid, thiophene, thymol, ortho-tolualdehyde, toluene, gam ma-undecalactone, undecylenic acid, iso-valeraldehyde, iso-valeric acid, gamma-valerolactone, vanillin, acetic acid, acetaldehyde, acetoin, propan-2-one, butanal, octanal, 2-hydroxypropanoic acid, butane-2,3-dione, propan-1-ol, 2-oxopropanoic acid, Methylsulfanylmethane, decanoic acid, propan-2-ol, 2-methylpropanal, butan-2-one, methyl acetate, 2-methylpropanoic acid, methyl benzoate, ethyl benzoate, ethyl 2-hydroxypropanoate, 2-methyl-5-propan-2-ylcyclohexa-1,3-diene, 1-methyl-4-propan-2-ylbenzene, 2-phenylethyl acetate, (3S)-3,7-dimethyloct-6-en-1-ol, ethyl octanoate, propane-1-thiol, ethyl formate, ethyl decanoate, heptan-2-one, methyl octanoate, undecanal, ethyl acetate, 4-methylpent-3-en-2-one, butane-2-thiol, ethyl pentanoate, heptan-2-01, methyl propanoate, hexan-3-one, pent-1-en-3-ol, methyl butanoate, (methyldisulfanyl) methane, pentyl acetate, nonan-2-ol, decan-2-one, bis(methylsulfanyl)methane, pentan-2-ol, hexyl hexanoate, 4-methoxybenzaldehyde, diethyl butanedioate, ethyl hexanoate, butyl acetate, 4-ethyl guaiacol, (R)-(+)-beta-citronellol, Limonene, laevo-beta-pinene, geraniol, thiolane, trimethyl amine.

Example 3: An aerosol generating article according to any preceding Example, wherein the at least 10 different odour components span an olfactory stimulus space.

Example 4: An aerosol generating article according to any preceding Example, wherein each of the at least 10 different odour components are provided at a substantially equal perceived-intensity.

Example 5: An aerosol generating article according to any preceding Example, wherein the odour inhibition substrate comprises at least 20, preferably at least 30 different odour components.

Example 6: An aerosol generating article according to any preceding Example, further comprising a wrapper circumscribing at least a portion of the aerosol-forming substrate, the odour inhibition substrate being provided on the wrapper.

Example 7: An aerosol generating article according to Example 6, wherein the odour inhibition substrate is provided as a band which circumscribes a portion of the wrapper.

Example 8: An aerosol generating article according to Example 6 or Example 7, wherein the odour inhibition substrate comprises a solid support material impregnated with odour components.

Example 9. An aerosol generating article according to any one of Examples 6 to 8, wherein the solid support material comprises a strip of paper.

Example 10: An aerosol generating article according to Example 9, wherein the upstream end of the strip of paper is at least 10 millimetres from the upstream end of the aerosol generating article.

Example 11: An aerosol generating article according to Example 9 or Example 10, wherein the downstream end of the strip of paper is at least 8 millimetres from the downstream end of the aerosol generating article.

Example 12: An aerosol generating article according to any one of Examples 9 to 11, wherein the strip of paper has a width of between about 0.5 millimetres and about 10 millimetres.

Example 13: An aerosol generating article according to Example 6, wherein the odour inhibition substrate comprises a portion of the wrapper with odour components adsorbed or absorbed thereon.

Example 14: An aerosol generating article according to any preceding Example, wherein the odour inhibition substrate comprises at least 0.01 grams of odour component.

Example 15: An aerosol generating article according to any preceding Example, further comprising a downstream segment, located downstream of the aerosol-forming substrate, wherein the odour inhibition substrate overlies the downstream segment.

Example 16: An aerosol generating article according to Example 15, wherein the downstream segment comprises a segment of filtration material.

Example 17: An aerosol generating system comprising, an aerosol generating device comprising a heater, and an aerosol generating article according to any preceding Example.

Examples will now be further described with reference to the figure in which:

FIG. 1 shows a schematic longitudinal cross-sectional view of an aerosol generating article according to the present invention; and

FIG. 2 shows a schematic longitudinal cross-sectional view of an aerosol generating system comprising an aerosol generating article according to the invention in cooperation with an aerosol generating device.

The aerosol-generating article 10 shown in FIG. 1 comprises an aerosol-forming substrate 12 and a downstream section 14 at a location downstream of the aerosol-forming substrate 12. Further, the aerosol-generating article 10 comprises an upstream element 16 at a location upstream of the aerosol-forming substrate 12. Thus, the aerosol-generating article 10 extends from an upstream or distal end 18 to a downstream or mouth end 20.

The aerosol-generating article 10 has an overall length of about 30 millimetres.

The downstream section 14 comprises a support element 22 located immediately downstream of the aerosol-forming substrate 12, the support element 22 being in longitudinal alignment with the aerosol-forming substrate 12. In the embodiment of FIG. 1 , the upstream end of the support element 18 abuts the downstream end of the aerosol-forming substrate 12. In addition, the downstream section 14 comprises an aerosol-cooling element 24 located immediately downstream of the support element 22, the aerosol-cooling element 24 being in longitudinal alignment with the rod 12 and the support element 22. In the embodiment of FIG. 1 , the upstream end of the aerosol-cooling element 24 abuts the downstream end of the support element 22.

As will become apparent from the following description, the support element 22 and the aerosol-cooling element 24 together define an intermediate hollow section 50 of the aerosol-generating article 10. As a whole, the intermediate hollow section 50 does not substantially contribute to the overall RTD of the aerosol-generating article.

The support element 22 comprises a first hollow tubular segment 26. The first hollow tubular segment 26 is provided in the form of a hollow cylindrical tube made of cellulose acetate. The first hollow tubular segment 26 defines an internal cavity 28 that extends all the way from an upstream end 30 of the first hollow tubular segment to an downstream end 32 of the first hollow tubular segment 26. The internal cavity 28 is substantially empty, and so substantially unrestricted airflow is enabled along the internal cavity 28.

The aerosol-cooling element 24 comprises a second hollow tubular segment 34. The second hollow tubular segment 34 is provided in the form of a hollow cylindrical tube made of cellulose acetate. The second hollow tubular segment 34 defines an internal cavity 36 that extends all the way from an upstream end 38 of the second hollow tubular segment to a downstream end 40 of the second hollow tubular segment 34. The internal cavity 36 is substantially empty, and so substantially unrestricted airflow is enabled along the internal cavity 36. The second hollow tubular segment 28—and, as a consequence, the aerosol-cooling element 24—does not substantially contribute to the overall RTD of the aerosol-generating article 10.

The aerosol-generating article 10 comprises a ventilation zone 60 provided at a location along the second hollow tubular segment 34. In more detail, the ventilation zone is provided at about 2 millimetres from the upstream end of the second hollow tubular segment 34. A ventilation level of the aerosol-generating article 10 is about 25 percent.

In the embodiment of FIG. 1 , the downstream section 14 further comprises an optional mouthpiece element 42 at a location downstream of the intermediate hollow section 50. In more detail, the mouthpiece element 42 is positioned immediately downstream of the aerosol-cooling element 24. As shown in the drawing of FIG. 1 , an upstream end of the mouthpiece element 42 abuts the downstream end 40 of the aerosol-cooling element 18.

The mouthpiece element 42 is provided in the form of a cylindrical plug of low-density cellulose acetate.

The aerosol-generating article 10 further comprises an elongate susceptor element 44 within the aerosol-forming substrate 12. In more detail, the susceptor element 44 is arranged substantially longitudinally within the aerosol-forming substrate, such as to be approximately parallel to the longitudinal direction of the rod 12. As shown in the drawing of FIG. 1 , the susceptor element 44 is positioned in a radially central position within the aerosol-forming substrate 12 and extends effectively along the longitudinal axis of the aerosol-forming substrate 12.

The susceptor element 44 extends all the way from an upstream end to a downstream end of the aerosol-forming substrate 12. In effect, the susceptor element 44 has substantially the same length as the aerosol-forming substrate 12 of aerosol-forming substrate.

The upstream element 46 is provided in the form of a cylindrical plug of cellulose acetate circumscribed by a stiff wrapper.

The aerosol-generating article 10 further comprises an odour inhibition substrate 60. The odour inhibition substrate 10 is in the form of a band formed by a strip of paper material circumscribing the mouthpiece element 42. The strip of paper is attached to the wrapper using an adhesive. The strip of paper is disposed about 12 millimetres downstream of the downstream end 20 of the aerosol generating article 10. The strip of paper in impregnated with at least 10 different odour components. Details of suitable combinations of odour components are set out below.

As shown in FIG. 2 , in use, the aerosol generating article 10 is inserted into an aerosol generating device 65. An induction coil in the aerosol generating device inductively heats the susceptor 44 in the aerosol generating article 10. The heating susceptor 44 heats the aerosol-forming substrate 12. The aerosol-forming substrate 12 generates a vapour which cools and nucleates into an aerosol in the hollow section 50. A pressure drop at the downstream end 20 of the aerosol generating article 10 draws air into the aerosol generating article 10 through the air inlets 60. The air drawn though the air inlets 60 entrains vapour from the aerosol-forming substrate 12. This air entrained with vapour then passes through the mouthpiece 42 and out of the downstream end of the aerosol generating article 10.

At the same time, the odour inhibition substrate 60 which is disposed outside of the aerosol generating article 10, releases odour inhibition molecules from the at least 10 different odour components. These molecules released from the at least 10 different odour inhibition produces an olfactory white which prevents the user from identifying the unpleasant odours generated by the aerosol-forming substrate.

Examples of suitable combinations of odour components which have been found to produce an olfactory white are set out below. The specific combinations of odour components are listed as “Ex-1” to “Ex-34” and are set out in Tables 1 to 4. The odour components of each example are identified by the chemical's PubMed CID number. The names of each odour component corresponding to each CID number are set out in Table 5 below.

Table 1 shows three Examples, Ex-1, Ex-2, and Ex-3. Ex-1 and Ex-2 each include 60 different odour components. There is also no overlap between Ex-1 and Ex-2. Example Ex-3 includes 30 different odour components.

Table 2 shows 5 Examples from Ex-4 to Ex-8. Each of Ex-4 to Ex-8 include 30 different odour components and span a physicochemical space.

Table 3 shows 12 Examples from Ex-9 to Ex-20. Ex-9, Ex-10, Ex-15, and Ex-16 each include 10 different odour components. Ex-11, Ex-12, Ex-17, and Ex-18 each include 20 different odour components. Ex-13, Ex-14, Ex-19, and Ex-20 each include 30 different odour components. The specific selection of odour components in Examples Ex-9 to Ex-20 were selected based on the odour perceptual space.

Table 4 shows 14 Examples from Ex-21 to Ex-34. Ex-21, Ex-22, Ex-27, and Ex-28 each include 10 different odour components. Ex-29 and Ex-30 each include 15 different odour components. Ex-23, Ex-24, Ex-31, and Ex-32 each include 20 different odour components. Ex-25, Ex-26, Ex-33, and Ex-34 each include 30 different odour components. The specific selection of odour components in Examples Ex-21 to Ex-34 were selected based on the odour physicochemical space.

For the purpose of the present description and of the appended claims, except where otherwise indicated, all numbers expressing amounts, quantities, percentages, and so forth, are to be understood as being modified in all instances by the term “about”. Also, all ranges include the maximum and minimum points disclosed and include any intermediate ranges therein, which may or may not be specifically enumerated herein. In this context, therefore, a number A is understood as A±5% of A. Within this context, a number A may be considered to include numerical values that are within general standard error for the measurement of the property that the number A modifies. The number A, in some instances as used in the appended claims, may deviate by the percentages enumerated above provided that the amount by which A deviates does not materially affect the basic and novel characteristic(s) of the claimed invention. Also, all ranges include the maximum and minimum points disclosed and include any intermediate ranges therein, which may or may not be specifically enumerated herein.

TABLE 1 Ex - 1 - 60 component Ex - 2 - 60 component Ex - 3 - 30 component Olfactory White Olfactory White Olfactory White 177 7921 176 8048 264 179 8030 240 8051 307 180 8103 264 8118 454 261 8148 307 8130 1031 326 8186 798 8892 6054 460 8635 1031 10430 6736 612 8858 2758 10722 7165 999 10560 2969 10882 7460 1060 10821 4133 11002 7600 1068 10890 6054 11124 7685 1127 10976 6184 11509 7793 1140 12020 6501 11552 7848 1146 12178 6590 12232 7888 2879 12180 6736 12741 7966 3314 12348 6989 14286 8025 3776 12367 7059 15380 8048 5634 17100 7150 16666 8091 6544 18827 7165 19310 8118 6561 22873 7363 22201 8797 6654 24915 7410 22386 8918 6982 26331 7600 31244 10722 7344 31249 7685 31276 12232 7463 31265 7731 62336 16666 7519 61016 7749 62433 22201 7583 62444 7762 91497 31272 7632 62465 7793 440917 31276 7654 93009 7848 440967 61138 7710 637566 7888 443158 91497 7714 5281168 7966 5281515 440967 7799 5283349 7991 6259976 6259976

TABLE 2 Ex - 4 - 30 Ex - 5 - 30 Ex - 6 - 30 Ex - 7 - 30 Ex - 8 - 30 component component component component component Olfactory Olfactory Olfactory Olfactory Olfactory White White White White White 177 179 179 176 179 264 261 261 180 1060 307 307 307 454 1127 460 460 612 6054 2879 1031 2969 3314 6544 6054 6054 6054 4133 6654 6561 4133 6569 6054 7059 6736 5634 6584 6584 7344 7059 6184 6989 7685 7460 7460 6501 7654 7793 7654 7583 7165 7685 7799 7685 7685 7654 7793 7921 7731 7714 7731 8048 8048 7799 8048 8091 8130 8103 7966 8118 8118 8148 8842 7991 8139 8842 8842 10882 8048 8186 8858 8892 11002 8139 8842 12180 12348 12180 8186 8858 17100 16666 12232 8842 10882 22873 24915 12741 16666 10890 24915 31249 16666 20859 12180 31272 31272 17100 24915 16666 62444 31276 20859 26331 24915 62465 62433 24915 31265 31244 93009 91497 91497 31272 31276 440917 93009 93009 31276 62444 443158 440917 440967 62465 93009 637566 637566 637566 637566 443158 643820 643820 643820 643820 637566 5281515 5281515 5283349 5281168 643820.

TABLE 3 CID EX-9 EX-10 EX-11 EX-12 EX-13 EX-14 EX-15 EX -16 EX-17 EX-18 EX-19 EX-20 Number 10 10 20 20 30 30 10 10 20 20 30 30 61199 7410 X X 14286 X 6501 X X X X X 7710 31276 X X 10890 X X 7600 X X 62433 X 7519 X X X 240 X 93009 X X X 264 X X X X X 11002 X X X 5281515 X X X 6259976 X X X 6982 X X 307 X X X 323 X X X X X X 2879 X X 8797 X X 7685 X X X X X 7731 X X 326 X X X X 7966 X X X 5283349 X X X 8148 X X X X 9609 24915 X 7632 X X X X 22201 X X X X 31252 X X 19310 X X X 7583 X X 7762 X X X X X X 7749 X X X 26331 X X 2758 X X X 3314 X X X X 7363 X X X X 460 X X X X X 8130 X 8129 X X X 6184 X X X 8892 X X X 8103 X X 12178 X X 5281168 X X 62336 X 7888 X X X X X X 798 X X X X 443158 X X X X 61016 X X X X 16666 X X X 7119 X X X 8635 X X X X X 20859 X X X X 7059 X X X X 4133 62444 91497 X X X 8918 X X X 957 X X X 18827 X X 7991 X X 61138 X X X X 999 X X X X 10821 X X X X 6054 X X X X 6544 X X X X 6654 X X 7770 X X X 8118 X X 6736 X X X X 17100 31277 8030 X X X X X 6989 X X 10722 X X 1140 X X X 7714 X X 5634 X X X 11552 10430 X X X X 7921 X 1183 X X X X X

TABLE 4 CID EX-21 EX-22 EX-23 EX-24 EX-25 EX-26 EX-27 EX-28 EX-29 EX-30 EX-31 EX-32 EX-33 EX-34 Number 10 10 20 20 30 30 10 10 15 15 20 20 30 30 61199 X X X 7410 X X X X X X 14286 X X X X 6501 X X X 7710 X X X X X 31276 X X X 10890 X X X X X 7600 X X X X X X X 62433 X X X X X 7519 X X 240 X X 93009 X X X X 264 X X X 11002 X X 5281515 X X X X 6259976 X X X 6982 X X X X 307 X X X X 323 2879 X X X 8797 X X X 7685 X X X X 7731 X X X 326 X X X 7966 X 5283349 X X X 8148 9609 24915 X X X X X 7632 X X X 22201 X X X 31252 X 19310 X X 7583 X X 7762 X X X 7749 X X X X 26331 X X X 2758 X 3314 X X X X X X 7363 460 X X X 8130 X 8129 X X X X X 6184 X X X 8892 X X X 8103 X X 12178 X X X 5281168 X X X X 62336 7888 X X X X 798 X 443158 X X X X X X 61016 X X X 16666 X X X X X X X 7119 X X 8635 X 20859 X 7059 X 4133 X X 62444 91497 X X X X X X 8918 X X X X X 957 X X X X 18827 X X X X 7991 X X X X 61138 X X X 999 X X X X X X 10821 X X 6054 X X X X 6544 X X X X 6654 X X X X X 7770 X X X X X X 8118 X X 6736 X X X 17100 X X X 31277 8030 X X X X 6989 X X X X 10722 X X 1140 X 7714 X X 5634 X X X X X X 11552 X X X 10430 X X X X X X 7921 X X X 1183 X X X

TABLE 5 CID CID Name Number Name Number abhexone 61199 propyl sulfide 8118 acetophenone 7410 skatole 6736 ortho-acetyl pyridine 14286 α-Terpineol 17100 strawberry aldehyde 6501 thioglycolic acid 31277 gamma-nonalactone 7710 thiophene 8030 isoamyl acetate 31276 thymol 6989 amyl butyrate 10890 ortho-tolualdehyde 10722 iso-pentyl phenyl acetate 7600 toluene 1140 pentyl valerate 62433 gamma-undecalactone 7714 anisole 7519 undecylenic acid 5634 benzaldehyde 240 iso-valeraldehyde 11552 iso-bornyl acetate 93009 iso-valeric acid 10430 butanoic acid 264 gamma-valerolactone 7921 butyl sulfide 11002 vanillin 1183 caryophyllene 5281515 acetic acid 176 celeriax 6259976 acetaldehyde 177 chlorothymol 6982 acetoin 179 cinnamic aldehyde 307 propan-2-one 180 coumarin 323 butanal 261 p-cresol 2879 octanal 454 p-cresyl acetate 8797 2-hydroxypropanoic acid 612 p-cresyl-iso-butyrate 7685 butane-2,3-dione 650 4-methyl anisole 7731 propan-1-ol 1031 cuminic aldehyde 326 2-oxopropanoic acid 1060 cyclohexanol 7966 methylsulfanylmethane 1068 2,4-trans-trans-decadienal 5283349 decanoic acid 2969 dibutyl amine 8148 propan-2-ol 3776 diethyl sulfide 9609 2-methylpropanal 6561 dimethyl benzyl carbinyl 24915 butan-2-one 6569 muguet carbinol 7632 methyl acetate 6584 2,3-dimethyl pyrazine 22201 2-methylpropanoic acid 6590 2,5-dimethyl pyrazine 31252 methyl benzoate 7150 dimethyl trisulfide 19310 ethyl benzoate 7165 diphenyl oxide 7583 ethyl 2-hydroxypropanoate 7344 ethyl butyrate 7762 2-methyl-5-propan-2- 7460 ylcyclohexa-1,3-diene ethyl propionate 7749 1-methyl-4-propan-2-ylbenzene 7463 2-ethyl pyrazine 26331 2-phenylethyl acetate 7654 eucalyptol 2758 (3S)-3,7-dimethyloct-6-en-1-ol 7793 eugenol 3314 ethyl octanoate 7799 furfuryl mercaptan 7363 propane-1-thiol 7848 guaiacol 460 ethyl formate 8025 heptanal 8130 ethyl decanoate 8048 1-heptanol 8129 heptan-2-one 8051 hexanal 6184 methyl octanoate 8091 hexanoic acid 8892 undecanal 8186 1-hexanol 8103 ethyl acetate 8857 3-hexanol 12178 4-methylpent-3-en-2-one 8858 trans-1-Hexanal 5281168 butane-2-thiol 10560 2-phenyl propionaldehyde 62336 ethyl pentanoate 10882 dimethyl acetal hydroxy citronellal 7888 heptan-2-ol 10976 Indole 798 methyl propanoate 11124 linalool 443158 hexan-3-one 11509 melonal 61016 pent-1-en-3-ol 12020 I-menthol 16666 methyl butanoate 12180 2-methoxy naphthalene 7119 (methyldisulfanyl) methane 12232 methyl anthranilate 8635 pentyl acetate 12348 methyl acetaldehyde dimethyl 20859 nonan-2-ol 12367 acetal para-methyl quinoline 7059 decan-2-one 12741 methyl salicylate 4133 bis(methylsulfanyl)methane 15380 S-(methyl thio) butyrate 62444 pentan-2-ol 22386 musk galaxolide 91497 hexyl hexanoate 22873 nonyl acetate 8918 4-methoxybenzaldehyde 31244 1-octanol 957 diethyl butanedioate 31249 1-octen 3-ol 18827 ethyl hexanoate 31265 pentanoic acid 7991 butyl acetate 31272 4-pentenoic acid 61138 4-ethyl guaiacol 62465 phenyl acetic acid 999 (R)-(+)-beta-citronellol 101977 phenyl acetylene 10821 limonene 440917 phenyl ethanol 6054 laevo-beta-pinene 440967 iso-phorone 6544 geraniol 637566 alpha-pinene 6654 thiolane 1127 propyl butyrate 7770 trimethyl amine 1146 

1.-14. (canceled)
 15. An aerosol-generating article, comprising: an aerosol-forming substrate; an odor inhibition substrate comprising at least 10 different odor components; and a wrapper circumscribing at least a portion of the aerosol-forming substrate, wherein the odor inhibition substrate is provided on the wrapper.
 16. The aerosol-generating article according to claim 15, wherein one or more of the at least 10 different odor components are selected from a list consisting of: Abhexone, acetophenone, ortho-acetyl pyridine, strawberry aldehyde, gamma-nonalactone, isoamyl acetate, amyl butyrate, iso-pentyl phenyl acetate, pentyl valerate, anisole, benzaldehyde, iso-bornyl acetate, butanoic acid, butyl sulfide, caryophyllene, celeriax, chlorothymol, cinnamic aldehyde, coumarin, p-cresol, p-cresyl acetate, p-cresyl-iso-butyrate, 4-methyl anisole, cuminic aldehyde, cyclohexanol, 2,4-trans-trans-decadienal, dibutyl amine, diethyl sulfide, dimethyl benzyl carbinyl butyrate, muguet carbinol, 2,3-dimethyl pyrazine, 2,5-dimethyl pyrazine, dimethyl trisulfide, diphenyl oxide, ethyl butyrate, ethyl propionate, 2-ethyl pyrazine, Eucalyptol, Eugenol, furfuryl mercaptan, guaiacol, heptanal, 1-heptanol, Hexanal, hexanoic acid, 1-hexanol, 3-hexanol, trans-1-Hexanal, 2-phenyl propionaldehyde dimethyl acetal, hydroxy citronellal, Indole, Linalool, Melonal, 1-menthol, 2-methoxy naphthalene, methyl anthranilate, methyl acetaldehyde dimethyl acetal, para-methyl quinoline, methyl salicylate, S-(methyl thio) butyrate, musk galaxolide, nonyl acetate, 1-octanol, 1-octen 3-ol, pentanoic acid, 4-pentenoic acid, phenyl acetic acid, phenyl acetylene, phenyl ethanol, iso-phorone, alpha-pinene, propyl butyrate, propyl sulfide, skatole, α-Terpineol, thioglycolic acid, thiophene, thymol, ortho-tolualdehyde, toluene, gamma-undecalactone, undecylenic acid, iso-valeraldehyde, iso-valeric acid, gamma-valerolactone, vanillin, acetic acid, acetaldehyde, acetoin, propan-2-one, butanal, octanal, 2-hydroxypropanoic acid, butane-2,3-dione, propan-1-ol, 2-oxopropanoic acid, Methylsulfanylmethane, decanoic acid, propan-2-ol, 2-methylpropanal, butan-2-one, methyl acetate, 2-methylpropanoic acid, methyl benzoate, ethyl benzoate, ethyl 2-hydroxypropanoate, 2-methyl-5-propan-2-ylcyclohexa-1,3-diene, 1-methyl-4-propan-2-ylbenzene, 2-phenylethyl acetate, (3S)-3,7-dimethyloct-6-en-1-ol, ethyl octanoate, propane-1-thiol, ethyl formate, ethyl decanoate, heptan-2-one, methyl octanoate, undecanal, ethyl acetate, 4-methylpent-3-en-2-one, butane-2-thiol, ethyl pentanoate, heptan-2-ol, methyl propanoate, hexan-3-one, pent-1-en-3-ol, methyl butanoate, (methyldisulfanyl) methane, pentyl acetate, nonan-2-ol, decan-2-one, bis(methylsulfanyl)methane, pentan-2-ol, hexyl hexanoate, 4-methoxybenzaldehyde, diethyl butanedioate, ethyl hexanoate, butyl acetate, 4-ethyl guaiacol, (R)-(+)-beta-citronellol, Limonene, laevo-beta-pinene, geraniol, thiolane, trimethyl amine.
 17. The aerosol-generating article according to claim 15, wherein the at least 10 different odor components span an olfactory stimulus space.
 18. The aerosol-generating article according to claim 15, wherein each of the at least 10 different odor components are provided at a substantially equal perceived intensity.
 19. The aerosol-generating article according to claim 15, wherein the odor inhibition substrate comprises at least 20 different odor components.
 20. The aerosol-generating article according to claim 15, wherein the odor inhibition substrate comprises at least 30 different odor components.
 21. The aerosol-generating article according to claim 15, wherein the odor inhibition substrate is provided as a band, which circumscribes a portion of the wrapper.
 22. The aerosol-generating article according to claim 15, wherein the odor inhibition substrate further comprises a solid support material impregnated with odor components.
 23. The aerosol-generating article according to claim 22, wherein the solid support material comprises a strip of paper.
 24. The aerosol-generating article according to claim 23, wherein an upstream end of the strip of paper is at least 10 millimeters from an upstream end of the aerosol-generating article.
 25. The aerosol-generating article according to claim 23, wherein a downstream end of the strip of paper is at least 8 millimeters from a downstream end of the aerosol-generating article.
 26. The aerosol-generating article according to claim 23, wherein the strip of paper has a width of between about 0.5 millimeter and about 10 millimeters.
 27. The aerosol-generating article according to claim 15, wherein the odor inhibition substrate further comprises a portion of the wrapper with odor components adsorbed or absorbed thereon.
 28. The aerosol-generating article according to claim 15, further comprising a downstream segment, located downstream of the aerosol-forming substrate, wherein the odor inhibition substrate overlies the downstream segment.
 29. An aerosol-generating system, comprising, an aerosol-generating device comprising a heater; and an aerosol-generating article according to claim
 15. 